Refrigeration & Air-Conditioning Practice Set-3

May 18, 2021

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1. Rating of a domestic refrigerator is of the order of

2. On the pressure-enthalpy diagram, condensation and desuperheating is represented by a horizontal line because the process

3. The domestic refrigerator uses following type of compressor

4. When the temperature of the surrounding is higher than the temperature of the body, then the heat loss by convection from the body to the surrounding will be

5. In actual air-conditioning applications for R-12 and R-22, and operating at a condenser temperature of 40° C and an evaporator temperature of 5° C, the heat rejection factor is about

6. The change in evaporator temperature in a refrigeration cycle, as compared to change in condenser temperature, influences the value of C.O.P.

7. In a refrigeration system, heat absorbed in comparison to heat rejected is

8. The freezing point of sulphur dioxide is

9. A bootstrap air cooling system has

10. The general rule for rating refrigeration systems (excepting for CO₂ system) is to approximate following h.p. per ton of refrigeration


 

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